Dead Pixels aren't always covered by warranty by the way.
This is why you should only purchase expensive shit online if you live in a country with a mandatory 14 day no-questions-asked return window for online purchases.
I have an old 48" plasma screen at my cottage that weighs about 200lbs. It's an old hand me down and its been through deep freeze every winter for about 10 years now and its still going. It has a thin vertical streak of a red line on the left side but the picture and sound still look great. I've been waiting for it to die so I can replace it but I think at this point it is just the living dead.